https://github.com/torvalds/linux
Revision bb7f0f989ca7de1153bd128a40a71709e339fa03 authored by Alexei Starovoitov on 19 December 2017, 04:12:00 UTC, committed by Daniel Borkmann on 21 December 2017, 01:15:41 UTC
There were various issues related to the limited size of integers used in
the verifier:
- `off + size` overflow in __check_map_access()
- `off + reg->off` overflow in check_mem_access()
- `off + reg->var_off.value` overflow or 32-bit truncation of
`reg->var_off.value` in check_mem_access()
- 32-bit truncation in check_stack_boundary()
Make sure that any integer math cannot overflow by not allowing
pointer math with large values.
Also reduce the scope of "scalar op scalar" tracking.
Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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- v2.6.19
- v2.6.18-rc7
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- v2.6.18-rc5
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- v2.6.18
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- v2.6.17-rc5
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- v2.6.17-rc2
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- v2.6.17
- v2.6.16-rc6
- v2.6.16-rc5
- v2.6.16-rc4
- v2.6.16-rc3
- v2.6.16-rc2
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- v2.6.16
- v2.6.15-rc7
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- v2.6.15-rc5
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- v2.6.14-rc5
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- v2.6.13-rc7
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- v2.6.12-rc4
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- v2.6.12-rc2
- v2.6.12
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History 
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Tip revision: bb7f0f989ca7de1153bd128a40a71709e339fa03 authored by Alexei Starovoitov on 19 December 2017, 04:12:00 UTC
bpf: fix integer overflows
bpf: fix integer overflows
Tip revision: bb7f0f9
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.4 KB |
| .mailmap | -rw-r--r-- | 8.8 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 96.2 KB |
| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 287 bytes |
| MAINTAINERS | -rw-r--r-- | 426.4 KB |
| Makefile | -rw-r--r-- | 58.3 KB |
| README | -rw-r--r-- | 722 bytes |
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